金属ナノ粒子の局在表面プラズモン共鳴を利用した電荷分離とその応用

抄録

Photoinduced charge separation is possible at interfaces between Au or Ag nanoparticles and TiO₂. The charge separation is based on localized surface plasmon resonance of the metal nanoparticles. The Au-TiO₂ system can be applied to visible light-responsive photocatalysts and photovoltaic cells. If Ag is used instead of Au, visible light-induced oxidation and UV light-induced re-reduction of Ag nanoparticles are possible. These new photoelectrochemical processes can be applied to multicolor photochromism and photoelectrochemical actuators based on hydrogels.